Steam boiler



Nov. 1 2, 1'929. w. H. wlNsLow 1,735,345

1 STEAM BOILER Y Filed Feb. 14, 1927 5 Sheets-Sheet 1 NOV. 12, 1929.-

H, wlNsLQw 1,735,345

STEAM BOILER Filed Feb. 14, 1927 3 Sheets-Sheet 2 Nov. 12, 1929. w, H,wlNsLoW STEAM BOILER 3 Sheets-Sheet 3 Filed Feb. 14, 192'/ Patented Nov.12, 1929 eaS'feffflS PATENT eFH-CE mnuninmn, wmsLoW, oFcHIcAGo,ILLINois, AssIGNoRmo Geenen W. DULANY, ,111.,

or CHICAGO, l ILLINOIS STEAM Berman.k

Applicationled February 14, 1927. kSerial No. 168,016.

This inventi-oirrelates to high pressure steam"fboile'rs particularlyuseful for railway Ste'ain engines,iste ain rail cL 5., buses, tractors,meterlaunchesv andthe like, and is of the i typetliat is ymade up lof anumber of sec tional units' which are 4a substantial duplicate .fofloneanother and which yare'readily remov ,able for replacement purposes.""llieniainobjects of this invention are to piovidefau improved form ofhigh pressure "boiler whiclrwill be exceptionally' free irom strains andstresses due to eiqansion of the generating tubes and connectingmanijlolds; "to, provide ya [boiler 'which lwill Lhave Yhigh eilivc'iency andexcellent,circulation;y and to provide aboil'ei of this classwhich is made up j; ol number of standardizedunits vor, sectionswliichaie interchangeable and readily assembledf,"y 'l j "Anillustrative embodiment ofthis in ventiony is shown in thelaccompanyingdrawings,

"iii'.wliicln-v v y Fig; 1 is a vertical, sectional elevation of Vtheimprovedtype of boiler ,25j Fig."2 is Aan venlarged fragmentary sectionytaken on thelline '2f-210i Fig. l; h

l {Fig/Bis an enlarged fragmentary section taken ontlie line ofFig. 1

Fig. l Ais an enlarged fragmentary detail,

3o `showing the generating'tuberibs which hold Athe. tub -is ,in spacedrelation;

Figf is aneiilarged V'iifragnienti,ry `section of several generatingtu'bes"sliowing their relative positions when assembled.

" Inlits general arrangement and also in the "details'of construction,this rboiler .isdesigiied toliperniit without injury the normalexpansions'and contractions `due toy the tempera ,tures and temperaturechanges with which 40 it must contend, and also *when yused 'as avlocomotive boiler to withstand the mechan* ,-vical shocks/or vibrationsimparted thereto.

f Thesiirrounding housing oi' the boiler is pro- `videdwith anunobstructed floor covered with heaft` resisting material forreliectingradiant ikheat;upwardly 'into the* boiler tubes. yThese and vertically'disposed loops; n

`Klhejlower, ends of the ytubes .communicate tubes are" arranged in twosets of overlapping 50.with staggered manifoldsextending vertilected vinsubstantially dry vided by the Athe 'boiler downcoinen nace and.conmiunicating @with superheaters vwhich are disposedinhorizon'tall'yextending groups of conduits iii-spacesiconvenientlyproaforesaid two setsfof looped tubes.

In the construction showninthe 1drawings `comprises a suitabley housingl which is provided vwith a smoke stack outlet away productsofcombustiomand with :suitable burners i?)` and located adj acent the botitoin of thelhousing 1, for supplying fuel to the boiler.v :The :floor ofthe housing 1 is constructed' of f the usual Y.radiating .heat .ma-

terial 15, as y'is ,customary rin Athist-ype ofboiler construction. l ill Enclosedwith-in the fhousing 1, along two opposite sides thereof, areseries of generating uiiits,eachof which ycomprises a verticallydisposed, tubular, downcomer manifold `10, whichis provided with aplurality ofgenerating tubes 11 which communicate with the downcoineradjacent thelowerportionfthereof and disposed at an anglefthereto. Thegenerating tubes -11 are .positioned on the one above another, `and'leadoutwardly and upwardly toward the opposite "opening `Q at @the :topthereof o'r carrying side 4of the 'boiler where the second series ofunitsare positioned', the upper ends 'of the :generating tubesbeing-'bent back upon themselves `toward 'the downcomer '10 andyterminating in spaced relation-thereto,

The upper ends of fthegenerating tubes 11 are attached to, Vandcommunicate ywitlifa verticallyv disposedl tubular, intermediate,

separating upcomer ,mani-fold 15 which isA `supportecl by a'fstiutcirculating generating tube 16 which is `mountedon,\andcommunicateswith-'the down-comer manifold l0. vvThe manifold '15l acts as aseparator for the steam V and water and is of greater cross sectionalareay than the combined cross sectional areas of the generating tubes 11which communicate therewith, and of less cross sectional area than thecombined cross sectional areas of a series of separa-ting tubes 17 whichprovide communication between the manifold 15 and the upper portion ofthe downcoiner manifold 10. A suitable insulating wall 18 is providedfor shielding the separating tubes from direct heat and extends from thelower end Vof the manifold 15 along the supporting strut 16 on` the rearside thereof to the downcomer 10.

The lower portions of the generating tubes 11 are oll'set or staggeredwith relation to one another, as shown particularly in Fig. 3 of thedrawings, so as to present'as great a number as possible of the tubes tothe direct heat from the burners and the radiating surface of theboiler, the points of bending of the tubes being in a vertical plane, asshown at 19, extending down to a point closely adjacent to the lowerportion of the downcoiner manifold iny order that the units may beassembled by raising in a vertical direction for replacement purposes.

The boiler sections or units are mounted in staggered relation to oneanother so as to secure compactness on a mud drum 2O which extends alongone side of the boiler, and the second series which extend along theopposite side of the boiler are mounted in the same manner and the twomud drums are connected together as shown at 21 rfor equalizingpurposes. A lire wall 22 surrounds and protects the mud drums and theconnection fittings on the lower end of the downcomers from directheatfrom the burners of the boiler. The units comprising each series areassembled with their generating pipes, and in spaced parallel relationto one another, and the two series are so positioned that the generatingpipes extend toward, and overlap, ther generating tubes of the oppositeseries, the tubes of one series alternating with the tubes of theopposite series and the adjacent sides of the generating tubes at thepoint of overlapping areyeach arovided with ribs 25 placed diametricallyoppositefeach other for holding vthe tubes in spaced relation, theseribs being of such thickness as to entirely fill the normal spacesbetween the tubes when the boiler sections are assembled each other insuch manner that a suitable tieand closely abut against rod (not shown)can be used to clamp the entire assembly of tubes snugly together.rlhese separating ribs 25 also provide a bale for the products ofcombustion in the fire boX of the boiler which is located substantiallymidway between the burner flames andthe smoke stack 2. n

The upper ends of all the manifolds of each series of boiler sectionsare connected by suitable pipes and fittings 30 to a common transversesteam header 31 and the headers 31 are each connected to a bank ofsuperheating coils 32 which are enclosed in the space surrounded by thegenerating tubes, separating tubes and manifolds. In this manner thebaffles formed by the ribs on the adjacent sides of the generating tubestend to deflect the gases and products of combustion outwardly againstthese banks of superheating tubes in very efficient manner.

A bank of preheating coils 35 which may be used for either air or water,is placed above the generating tubes in such manner as to receive heatfrom the products of combus tion just before leaving the boiler.

The water is supplied to the boiler by any suitablefmeans (not shown)through pipes which are placed concentrically in the mud drums 20, thesepipes being provided with a. series of short nipples 41, one nipplebeing provided for each downcomer manifold, and extending upwardly adjacentl the lower end thereof so that water is supplied in equal quantitytoeach of the boiler sections. The nipples l1 are of sutliciently smalldiameter, relative to the connections used for mounting the downcomermanifolds, that water from the manifolds can pass around the out-ersides thereof into the mud drum, and equalization between the sectionsis thus secured.

ln the operation of the boiler it is filled through the pipes 40 and themud drums 2O and fuel is supplied through the burners 3 and Il. llfhenthe generating tubes 11 be.

come heated and steam generated therein the water and steam travelupwardly in tubes into the intermediate manifolds 15 wherein a partialseparation of the steam and water takes place. Steam passes through theupper separating tubes y17 to the upper portion of trie downcomermanifold 10 and the water returns through the lower separating tubes ofthe series.

VThe relative cross-sectional areas of the separating tubes 17,separator manifold 15, and generator tubes 11 communicating therewith isso proportioned that a free and ef ficient circulation is maintained atall times without a reversal of circulation taking place therein. Thesteam passes out through the connections 30 on the tops of the downcomermanifolds 10. thence into the steam headers 31. From there the steamtravels to the superheating tubes 32 and thence to the engine or otherappliance to which it is desired to supply steam.

rlhe separating or spacing ribs 25 which are on adjacent sides of theoverlapping portions of the generating tubes 11 take up the rubbing orchafing action of the tubes due to vibration and relative shifting ofthe tubes and prevent the adjacent side walls from becoming` rubbed thinand thus weakcned. Qrdinarily, in a boiler of this kind, regardless ofthe precision and accuracy wit Although but one specific embodiment ofthis invention has been herein shown and described, it will beunderstood that numerous modifications may be made without departingfrom the s iirit of this invention, as defined by the following claims.

I claim: n

l. A boiler construction of the class described comprising an uprighttubular downcomer manifold, generating tubes communieating with saidmanifold adjacent the lower portion thereof and inclined at an anglethereto, the upper ends of said tubes being bent back upon themselvestowards said manifold, and posed tubular separating manifoldcommunicating with the upper ends of'said generating tubes, and meansproviding communication for water and steam from said separatingmanifold to the upper por-` tion of said downcomer manifold.

2. A boiler of the class described comprising an upright tubulardowncomer manifold, generating tubes having their lower endscommunicating with said manifold adjacent the lower portion thereof,said ytubes being inclined at an angle to said manifold, the

upper ends of said tubes being bent back.

upon themselves towards said manifold, an upright tubular intermediateseparating manifold communicating with the upper ends of said tubes, anda series of separating tubes providing communication between saidseparating manifold and the upper portion of said downcomer manifold.

3. A boiler 0f the class described comprising an upright tubulardowncomer manifold, generating tubes having their lowerendscommunicating with said manifold adJacent the lower portion thereof,said tubes being inclined at an angle to said manifold, the

upper ends of said tubes b eing bent back upon themselves towards saidinanifold, an upright 'tubular intermediate separating manifoldcommunicating with the upper ends of said tubes, a series of separatingtubes providing communication between saidseparating manifold and theupper portionof said downcomer manifold and means on rs aid downcomerfor supporting said separating manifold. l

4. A boiler of the class described comprising an upright tubulardowncomer manifold, generating tubes having their lower endscommunicating with said manifold adiaoent the lower portion thereof,said tubes being inf clined at an angle to said manifold, the upper endsof said tubes being bent back upontheinintermediate vertically dis-y`tubes being provided with selves towards said manifold, an uprighttubular intermediate separating manifold communicating with the upperends of said tubes, a series of separating tubes providing communicationbetween said separating manifold and the upper portion of said downcomermanifold, and a strut generating tube mounted on and communicating withsaid downcomer manifold for supporting said separating manifold.

5. A boiler of the class described comprising an upright tubulardowncomer manifold,

' generating tubes having their lower ends communicating with saidmanifold adjacent the lower portion thereof, said tubes being inclinedat an angle to said manifold, the upper ends of said tubes being bentback upon themselves towards said manifold, an'upright tubularintermediate separatingr manifold communicating with the upper ends ofsaid tubes, a series of separating tubes providing communication betweensaid separating manifold and the upper portion of said downcomermanifold, and a heat insulating wall extending from said separatingmanifold to said downcomer manifold for shielding said separating tubesfrom direct radiation.

6. A boiler comprising two units each of which comprises an uprighttubular downcomer manifold,a series of generating tubes having theirlower ends communicating with said downcomer manifold adjacent the lowerportion thereof, said tubes being arranged one above another andinclined at an angle to said manifold, an upright tubular intermediateseparating manifold communicating with'the upper ends of said generatingtubes and a series of tubes providing communication between saidseparator manifold and the upper portion of said downcomer manifold,said units being arranged in two spaced seiies with the generating tubesof each series extending toward and overlapping the generating tubes ofthe opposite series, and the adjacent sides of the overlappinggenerating chafing ribs for holding the ytubes in spaced relation toeach other. f

f Signed at Honolulu this 31st day of J anuary, 1927.

WILLIAM H. WIN SLOW.

